Using parallel complex permeability for ferrite characterization

The authors address topics related to the characterization of linear ferrite materials using real and imaginary components of parallel permeability. Significant advantages are found in using the parallel rather than the usual series form of complex permeability to represent the performance of high-permeability ferrite cores. The findings include independence of the number of turns, a new equation for core loss density, a more direct examination of ferrite properties, and a reinterpretation of Snoek´s limit. It is concluded that the parallel components of complex permeability provide direct measures of the inherent ferrite material properties